The mechanism of microwave rock breaking and its potential application to rock-breaking technology in drilling

作     者：Ming-Zhong Gao Ben-Gao Yang Jing Xie Si-Qi Ye Jun-Jun Liu Yi-Ting Liu Rui-Feng Tang Hai-Chun Hao Xuan Wang Xiang-Yue Wen Xue-Min Zhou Ming-Zhong Gao;Ben-Gao Yang;Jing Xie;Si-Qi Ye;Jun-Jun Liu;Yi-Ting Liu;Rui-Feng Tang;Hai-Chun Hao;Xuan Wang;Xiang-Yue Wen;Xue-Min Zhou

作者机构：Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and UtilizationCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhenGuangdong518060China State Key Laboratory of Hydraulics and Mountain River EngineeringCollege of Water Resource&HydropowerSichuan UniversityChengduSichuan610065China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2022年第19卷第3期

页      面：1110-1124页

核心收录：

学科分类：0820[工学-石油与天然气工程] 082001[工学-油气井工程] 08[工学] 

基　　金：financially supported by National Natural Science Foundation of China(U2013603,52004167) Program for Guangdong Introducing Innovative and Enterpreneurial Teams(No.2019ZT08G315) China Postdoctoral Science Foundation(2021T140485) 

主　　题：Microwave Well drilling High efficiency Granite 

摘      要：The exploration and development of oil and gas resources have shifted from shallow to deep and ultradeep.The difficulty of rock breaking has also increased,introducing new challenges to traditional rock-breaking technology.Hence,there is an urgent need to develop new rock-breaking technologies to improve the development efficiency of deep oil and gas resources.Therefore,this study focused on the new microwave rock-breaking technology and conducted experimental and numerical simulation research on typical deep,hard rock granite.The research results showed that granite in the microwave field exhibited high-temperature melting and fracture,and the highest temperature could reach 550°C.Under the irradiation of circulating microwaves,a minimum irradiation time threshold of 3 min was needed to cause irreversible damage to the rock.The numerical simulation results showed that the interaction of thermal stress and in situ stress would cause the inside of the rock stratum to separate into a disturbed deterioration area,disturbed unloading area and initial stress area.These results are expected to provide the necessary technical guidance and theoretical support for the research and development of high-efficiency rock-breaking drilling for deep hard rock.